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据科学家研究证明,服用维生素B_1除可满足正常的人体生命活动需要外,在炎热的夏季里还可有效地防止蚊虫叮咬。他们每天让野外工作
According to research by scientists, taking vitamin B_1 can not only meet the needs of normal human life activities, it can also effectively prevent mosquito bites during the hot summer months. They make fieldwork every day